EP2056293A2 - Datenverarbeitungsverfahren und Datenverarbeitungsvorrichtung - Google Patents

Datenverarbeitungsverfahren und Datenverarbeitungsvorrichtung Download PDF

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Publication number
EP2056293A2
EP2056293A2 EP09150862A EP09150862A EP2056293A2 EP 2056293 A2 EP2056293 A2 EP 2056293A2 EP 09150862 A EP09150862 A EP 09150862A EP 09150862 A EP09150862 A EP 09150862A EP 2056293 A2 EP2056293 A2 EP 2056293A2
Authority
EP
European Patent Office
Prior art keywords
data
tfo
encoding
mode
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09150862A
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English (en)
French (fr)
Other versions
EP2056293A3 (de
Inventor
Yasutaka Kanayama
Teruyuki Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP2056293A2 publication Critical patent/EP2056293A2/de
Publication of EP2056293A3 publication Critical patent/EP2056293A3/de
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/173—Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0364—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude for improving intelligibility

Definitions

  • the TFO frame is indicated as the shaded area, while the TFO message is indicated as the heavier shaded area.
  • the TFO message is used as a means for negotiation with the exchange or base station of the opposite side and the least significant one bit is used in every 16 samples of the PCM data.
  • the TFO frame is the region for actually carrying the compressed code data. Data such as the encoded data is stored to this TFO frame.
  • Fig. 3(c) illustrates the audio signal and encoded signal of communication after the remote hand-over is generated. Since the audio signal output from terminal 15B is formed by decoding the compressed code data 20E and the compressed code data 20E is output from CODEC 13B in the error condition, the audio signal output from terminal 15B changes to a silent signal.
  • the CODEC in the TFO condition receives the PCM data not including the TFO frame due to generation of the remote hand-over, the audio signal output changes to a silent signal for a certain period.
  • tandem connecting condition is not generated when the PCM data not including the TFO frame is transmitted, for example, that the output audio signal changes to a silent signal for a certain period under the remote hand-over condition illustrated in Fig. 3 .
  • Another embodiment relates to a data processing method corresponding to the above-described data processing apparatus.
  • signal noise due to the data of the multiplexed part generated by the encoding of the third data with the second encoding system in the second mode can be lowered when the operation mode is switched to the second mode from the first mode.
  • a data transmission system includes a first terminal which outputs a second data formed by encoding analog signal with a second encoding system, a first data terminal which inputs the second data and outputs a first data encoded with a first encoding system in the first mode and also outputs a third data multiplexing the second data and the first data in the second mode, and a second data terminal which inputs the first or third data and outputs a fifth data formed by encoding the first data with a second encoding system in the first mode and also outputs the second data isolated from the third data inputted in the second mode, and a second terminal which inputs the second or fifth data outputted from the second data terminal and outputs the analog signal.
  • the data for resetting the data processing apparatus for decoding the data output in the second encoding system is outputted through addition to the fourth data before the switching operation when the operation mode is switched to the first mode or second mode.
  • signal noise due to the data of the multiplexed portion in the case of the encoding of the third data with the second encoding system in the second mode can be lowered when the first mode is switched to the second mode.
  • the input starting position of the third data determined as input may be obtained from the signal to be transmitted before the third data is transmitted.
  • the TFO determining section 9A outputs the determining information for TFO switching (switching between TFO and tandem connection) on the basis of the information output from the TFO frame detecting section 7A and TFO message detecting section 8A.
  • the signal noise alleviation processing section 4A processes and outputs the PCM signal output from the TFO frame detecting section 7A and TFO message detecting section 8A. Since only the most significant six bits of the PCM signal formed by decoding the compressed code data remain as the original PCM data in the PCM data including the TFO frame and TFO message, the signal noise alleviation processing section 4A varies a value of the lesser two bits of the PCM data and outputs this value to the encoding section 5A on the basis of the information input from the TFO frame detecting section 7A and TFO message detecting section 8A.
  • the two least significant bits of the PCM data take values of four patterns of (0,0), (0,1), (1,0) and (1,1) but since the appearance probability of the four patterns of the PCM data is thought to be statistically identical, an error from the PCM data which is formed by decoding of the compressed code data can be reduced by filling the TFO frame with the value near to the average value of the four patterns.
  • the tandem connecting condition is shifted to the TFO condition and moreover offset an amount of the TFO frame commencement position and the TFO#TRANS message is also specified. Accordingly, existence of the TFO frame can be detected more accurately by detecting the TFO#TRANS message in place of the TFO frame synchronization bit.
  • the PCM data transmitted from the transmitting side CODEC changes to the PCM data including the TFO frame but it is also specified that the transmitting side CODEC should transmit the TFO#TRANS message 37A just before transmission of the first TFO frame 35A.
  • the encoding processing frame 30B can also execute, unlike the case illustrated in Fig. 5(b) , the signal noise alleviation process as illustrated in Fig. 6(b) by detecting the TFO#TRANS message 37A.
  • the TFO secondary determining section 10A determines to shift to the tandem connecting condition.
  • the time required to shift to the tandem connecting condition after disappearance of the TFO frame can be shortened by the introduction of the determination by the TFO secondary determining section 10A.
  • the homing frame can be transmitted synchronously with the shift to the tandem connecting condition.
  • the silent condition can be shortened because the CODEC is controlled by the TFO secondary determining section 10A to shift to the tandem connecting condition.
  • TFO determination of switching for the TFO condition and the tandem connecting condition is performed in two stages with the TFO determining section (9A) and the TFO secondary determining section (10A) in order to shorten the silent condition period.
  • the homing signal is transmitted to prevent generation of a noise signal due to the mismatching of internal'condition variables of the CODEC for the decoding process.

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  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Selective Calling Equipment (AREA)
EP09150862A 2003-04-22 2004-03-31 Datenverarbeitungsverfahren und Datenverarbeitungsvorrichtung Withdrawn EP2056293A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003117209A JP4370802B2 (ja) 2003-04-22 2003-04-22 データ処理方法およびデータ処理装置
EP04251923A EP1471503A3 (de) 2003-04-22 2004-03-31 Datenverarbeitungsverfahren und Datenverarbeitungsvorrichtung

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP04251923A Division EP1471503A3 (de) 2003-04-22 2004-03-31 Datenverarbeitungsverfahren und Datenverarbeitungsvorrichtung

Publications (2)

Publication Number Publication Date
EP2056293A2 true EP2056293A2 (de) 2009-05-06
EP2056293A3 EP2056293A3 (de) 2009-07-01

Family

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EP04251923A Withdrawn EP1471503A3 (de) 2003-04-22 2004-03-31 Datenverarbeitungsverfahren und Datenverarbeitungsvorrichtung
EP09150862A Withdrawn EP2056293A3 (de) 2003-04-22 2004-03-31 Datenverarbeitungsverfahren und Datenverarbeitungsvorrichtung

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EP04251923A Withdrawn EP1471503A3 (de) 2003-04-22 2004-03-31 Datenverarbeitungsverfahren und Datenverarbeitungsvorrichtung

Country Status (4)

Country Link
US (1) US20040213296A1 (de)
EP (2) EP1471503A3 (de)
JP (1) JP4370802B2 (de)
CN (1) CN1246828C (de)

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DE602004025688D1 (de) * 2003-04-22 2010-04-08 Nec Corp Codeumsetzungsverfahren und einrichtung, programm und aufzeichnungsmedium
WO2005119940A1 (ja) * 2004-06-01 2005-12-15 Nec Corporation 情報提供システム及び方法並びに情報提供用プログラム
JP4678486B2 (ja) * 2005-03-11 2011-04-27 ソニー株式会社 多重化装置および多重化方法、プログラム、並びに記録媒体
WO2007014228A2 (en) * 2005-07-26 2007-02-01 Nms Communications Corporation Methods and apparatus for enhancing ringback tone quality during telephone communications
CN101283252B (zh) * 2005-10-05 2013-03-27 Lg电子株式会社 信号处理的方法和装置以及编码和解码方法及其装置
US7603113B2 (en) * 2005-12-31 2009-10-13 Adobe Systems Incorporated Using local codecs
US20130167024A1 (en) 2006-12-05 2013-06-27 Adobe Systems Incorporated Embedded document within an application
US7743339B1 (en) 2007-02-01 2010-06-22 Adobe Systems Incorporated Rendering text in a brew device
US8589779B2 (en) 2007-03-08 2013-11-19 Adobe Systems Incorporated Event-sensitive content for mobile devices
CN102195744A (zh) * 2010-03-12 2011-09-21 中兴通讯股份有限公司 无码型转换器级联操作的异常处理方法及码型转换器
US20130166052A1 (en) * 2011-12-27 2013-06-27 Vamshi Kadiyala Techniques for improving playback of an audio stream
CN103871415B (zh) * 2012-12-14 2017-08-25 中国电信股份有限公司 实现异系统间语音互通的方法、系统与tfo转换装置
CN108806706B (zh) * 2013-01-15 2022-11-15 韩国电子通信研究院 处理信道信号的编码/解码装置及方法

Citations (1)

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US5991716A (en) 1995-04-13 1999-11-23 Nokia Telecommunication Oy Transcoder with prevention of tandem coding of speech

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US6172974B1 (en) * 1997-10-31 2001-01-09 Nortel Networks Limited Network element having tandem free operation capabilities
FI116642B (fi) * 1998-02-09 2006-01-13 Nokia Corp Puheparametrien käsittelymenetelmä, puhekoodauksen käsittely-yksikkö ja verkkoelementti
FI107211B (fi) * 1999-07-09 2001-06-15 Nokia Networks Oy Menetelmä koodaustiedon välittämiseksi pakettiverkon yli
CA2370664C (en) * 2000-02-18 2009-02-03 Nokia Networks Oy Communications system
FI115329B (fi) * 2000-05-08 2005-04-15 Nokia Corp Menetelmä ja järjestely lähdesignaalin kaistanleveyden vaihtamiseksi tietoliikenneyhteydessä, jossa on valmiudet useisiin kaistanleveyksiin
WO2003024137A1 (en) * 2001-09-13 2003-03-20 Nokia Corporation Signal processing device and signal processing method
US7158572B2 (en) * 2002-02-14 2007-01-02 Tellabs Operations, Inc. Audio enhancement communication techniques
JP2004061646A (ja) * 2002-07-25 2004-02-26 Fujitsu Ltd Ｔｆｏ機能を有する音声符号化器および方法

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US5991716A (en) 1995-04-13 1999-11-23 Nokia Telecommunication Oy Transcoder with prevention of tandem coding of speech

Also Published As

Publication number Publication date
JP4370802B2 (ja) 2009-11-25
CN1540628A (zh) 2004-10-27
EP2056293A3 (de) 2009-07-01
EP1471503A2 (de) 2004-10-27
US20040213296A1 (en) 2004-10-28
CN1246828C (zh) 2006-03-22
JP2004325583A (ja) 2004-11-18
EP1471503A3 (de) 2005-10-19

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